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The Contribution of Motor Commands to the Perturbations Induced by Sensorimotor Conflicts in Fibromyalgia. | LitMetric

The Contribution of Motor Commands to the Perturbations Induced by Sensorimotor Conflicts in Fibromyalgia.

Neuroscience

Center for Interdisciplinary Research in Rehabilitation and Social Integration, 525 boulevard Wilfrid Hamel, Québec, QC G1M 2S8, Canada; Department of Rehabilitation, Laval University, 1050 avenue de la médecine, Québec, QC G1V 0A6, Canada. Electronic address:

Published: May 2020

AI Article Synopsis

  • * The study aimed to clarify the roles of motor outputs and sensory inputs in these disturbances, utilizing robot technology to analyze responses in both groups during different types of conflicts.
  • * Results indicated that increased sensitivity to conflicts in fibromyalgia was closely linked to issues with sensory-motor responses rather than problems with sensory feedback, suggesting difficulties in updating predicted sensory information rather than executing motor commands effectively.

Article Abstract

Individuals with pain report higher sensory disturbances during sensorimotor conflicts compared to pain-free individuals. In the pain field, it is frequently assumed that disturbances arise from a discordance between sensory and efference copies (defined as sensory-motor conflict), while in the sensorimotor control field they are considered to result from the incongruence between sensory modalities (defined as sensory-sensory conflict). The general aim of this study was to disentangle the relative contribution of motor efferences and sensory afferences to the increased sensitivity to sensorimotor conflicts in individual with fibromyalgia (n = 20) compared to controls (n = 20). We assessed sensory and motor disturbances during sensory-sensory and sensory-motor conflicts using a robotized exoskeleton interfaced with a 2D virtual environment. There was a significant interaction between the group and the type of conflict (p = 0.03). Moreover, the increase in conflict sensitivity from sensory-sensory to sensory-motor conflicts in fibromyalgia was related to conflict-induced motor disturbances (r = 0.57; p < 0.01), but did not result from a poorer proprioception (r = 0.12; p = 0.61). Therefore, it appears that higher conflict sensitivity in fibromyalgia is mainly explained by a sensory-motor conflict rather by a sensory-sensory conflict. We suggest this arises due to a deficit in updating predicted sensory feedback rather than in selecting appropriate motor commands.

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Source
http://dx.doi.org/10.1016/j.neuroscience.2020.03.017DOI Listing

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